i have a 1994 ford 7840 sle and the pto shuts itself off in 540. it does not seem to do it in 1000 running at 540. also if you watch the light on the pto switch you can see it flicker giving the impression its an electrical fault?
Hi I will help you with your problem,First please don't rate or accept until all your questions are answered that way you won't have to pay twice OKFirst are you talking about rpm verses what gear you are in please clarify?Next the light flickering may be that the pto is not going all the way to engage, so it would be not making a complete good contact, or it is a loose electrical connection.Next is it a manual cable to engage pto ,or electric or electric and hydraulic or don't you know?One more thing I have to leave in a hour and will b gone for about a hour but then I will be Here the rest of the day just so your not waiting for me all you have to do is reply to expert and I will get the message OK
hi, thanks, it doesnt appear to make a difference what gear you are in trasmission wise. just 540 or 1000 on pto. that lever is cable into the side of pto ( have tried adjusting that as someone else suggested) the pto switch itself is electrical twist ( checked connections on back and all seem tight) as from what happens from there to pto is where im out of my depth. at first it seemed to just cut out when i was doing somethin else with the pressure i.e. spools for lifting mower or arms for tedder. but then i noticed it doing it just in a straight line in field without altering anything else. arms and draft control are manual and not electric. when tedding with a light haybob and it was cutting out i selected 1000 on pto so engine was running at 1100 rpm and went ok from then on. i put a flail topper on yesterday and run in 540 at 1900rpm and it went back to randomly cutting out, so i dont know if thats down to pto range or engine revs. when topping through a thick heavy section it would pull the engine back without cutting the pto out so it does appear to have drive. my mechanical knowledge is very very basic but i hope this info helps you to help me. thanks
first when you say pto switch is twist do you mean it is a variable switch like a radio were you turn and it goes up and down that would be called a potentiometer switch.It sounds like one of two things, first is pto adjustment of the cable, next would be a overload of pto.There should be a plate on your pto that tells you how much pressure it is capable off making and how much flow or Gallons per minute [gpm] it produces. It sounds like one of them two things.So first on your pto cable adjustment with the cable pushed all the way in, remove cable from lever or loosen set screw which locks it in place,then manually push lever all the way to engage then disengage and mark on pto housing so you know how far it needs to go to on and then off [you may have to have back wheel off ground with brakes released so when you try to engage pto all the way you can turn drive shaft while moving lever all the way] put a mark on pto so you know how far it needs to be when engaged then put lever back to off all the way and mark,lock down cable then check to make sure it is going all the way both directions. if that works great if not get me info off tag and how much gpm all your add on need it mite be it's just not big enough to run all your options. Let me know how you make out and have a great day spanky
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